Model: 03100291 - Color: Black - Material: Plastic - Features: - Operating voltage: DC 4.5 ~ 30V; - Measure voltage: DC 0~100V; - Minimum resolution(V): 0.1V; - Measure current: 50A (require external shunt); - Minimum resolution(A): 0.1A; - Operating current: <20mA; - Display: 0.28" LED 3-digital tube; - Display color: Red; - Dimensions: 48 x 29 x 21mm; - Mounting cutout: 45.5 x 26.5mm; - Refresh rate: about 500mS / times; - Measure accuracy: 1% (+/- 1-digit); - Operating temperature: -10C~65C; - Operating humidity: 10%~80% (non-condensing); - Working pressure: 80 ~106kPa - Applications: Suitable for automotive / electric cars / motorcycles battery monitoring or other products voltage current measurement; - Notice: - The voltage between the thin red and thin black lines must be within DC 4.5~30V; - The ammeter can only be connected to the negative of the device under test; - Exceeds 5A long-term full load working continuously it is recommended that the measurement side of the leads are directly soldered to the socket; - When the black thin line vacant it is better to use insulating tape around the exposed part of the wire to prevent short circuits; If just be used as a voltmeter it is recommended that the yellow line and the black line were connected together to prevent the ammeter digital flashing - Applications: Suitable for automotive / electric cars / motorcycles battery monitoring or other products voltage current measurement; - Wiring: - Black line (thin): vacant or buck circuit (module) negative; - Red line (thin): power supply+; - Black line (thick): COM common measuring; - Red line (thick): PW+ measuring terminal voltage input positive; - Yellow line (thick): IN+ current input+ (Please refer to the wiring diagrams for more details); - Notice: The voltage between the thin red and thin black lines must be within DC 4.5~30V; - The ammeter can only be connected to the negative of the device under test; Exceeds 5A long-term full load working continuously it is recommended that the measurement side of the leads are directly soldered to the socket; - When the black thin line vacant it is better to use insulating tape around the exposed part of the wire to prevent short circuits; - If just be used as a voltmeter it is recommended that the yellow line and the black line were connected together to prevent the ammeter digital flashing - Packing List: - 1 x Digital volt amp meter - 1 x 50A / 75mV DC current shunt